Investigating Secant and Tangent Lines (Slide 6)

Drag point C around the circle and observe the angle measure.
What happens to the measure of`<ABC` as point C gets closer to B? 
What is the measure of <ABC when point C is right on top of point B? 
Tancar
– Alicia Turner

Informació: Investigating Secant and Tangent Lines (Slide 6)